[syzbot] Monthly bluetooth report (Sep 2025)

[syzbot]

Hello bluetooth maintainers/developers,

This is a 31-day syzbot report for the bluetooth subsystem.
All related reports/information can be found at:
https://syzkaller.appspot.com/upstream/s/bluetooth

During the period, 2 new issues were detected and 1 were fixed.
In total, 38 issues are still open and 91 have already been fixed.

Some of the still happening issues:

Ref  Crashes Repro Title
<1>  43283   Yes   KASAN: slab-use-after-free Read in l2cap_unregister_user
                   https://syzkaller.appspot.com/bug?extid=14b6d57fb728e27ce23c
<2>  7364    Yes   WARNING in call_timer_fn
                   https://syzkaller.appspot.com/bug?extid=6fb78d577e89e69602f9
<3>  3411    Yes   general protection fault in lock_sock_nested
                   https://syzkaller.appspot.com/bug?extid=d3ccfb78a0dc16ffebe3
<4>  1710    Yes   general protection fault in h5_recv
                   https://syzkaller.appspot.com/bug?extid=b5691bb559396b262064
<5>  719     Yes   WARNING in hci_conn_timeout (2)
                   https://syzkaller.appspot.com/bug?extid=fc4b5b2477d4ca272907
<6>  360     Yes   WARNING: ODEBUG bug in hci_release_dev (2)
                   https://syzkaller.appspot.com/bug?extid=b170dbf55520ebf5969a
<7>  304     No    WARNING in l2cap_chan_del
                   https://syzkaller.appspot.com/bug?extid=3272785b7a1fc9b510f6
<8>  274     Yes   possible deadlock in l2cap_conn_del
                   https://syzkaller.appspot.com/bug?extid=b71bb48c13bf3fed3692
<9>  139     Yes   KASAN: slab-use-after-free Read in l2cap_recv_frame
                   https://syzkaller.appspot.com/bug?extid=5c915dc5dd417b83b348
<10> 113     No    BUG: corrupted list in hci_cmd_sync_dequeue_once
                   https://syzkaller.appspot.com/bug?extid=5250d87dea2afdb718a5

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